BLUES

Reservoir

#01638B

RGB 1, 99, 139 · HSL 197°, 99%, 27% · CMYK 99, 29, 0, 45

Reservoir is #01638B in HEX — rgb(1, 99, 139), hsl(197°, 99%, 27%), cmyk(99%, 29%, 0%, 45%).

Reservoir pulls into the deep end of the blues spectrum — HSL 197°, 99%, 27%. The saturated saturation makes it bold and immediate, and the hue reads cool. In interior projects it shines on bedrooms, bathrooms, home offices — for calm, focused environments. Reads best alongside warm white trim, oak or walnut, brass or matte black hardware.

Color Codes

HEX#01638B

RGB1, 99, 139

HSL197°, 99%, 27%

HSV197°, 99%, 55%

CMYK99, 29, 0, 45

Decimal91019

CSS RGBrgb(1, 99, 139)

CSS HSLhsl(197, 99%, 27%)

Paint Matches — this color across 16 brands

Dulux

Mamala Bay S34G7

ΔE 0.1 · #00638B

Dunn-Edwards

Ink Blotch DE5839

ΔE 2.5 · #00608B

Behr

Southern Evening 550D-7

ΔE 2.6 · #1E678D

PPG

Blue Flame 1157-7

ΔE 2.7 · #005E88

Sherwin-Williams

Jay Blue SW6797

ΔE 3.1 · #015D87

Benjamin Moore

Bermuda 2061-30

ΔE 3.3 · #195E83

Vista Paint

Ahoy! Blue K-1246

ΔE 4.3 · #006C92

Hallman-Lindsay

Job's Tears 676

ΔE 6.4 · #005B7A

Kilz

Wind Surfing RD110-02

ΔE 6.7 · #366C8E

Valspar

Pacific Pleasure 5009-10

ΔE 7.7 · #146C8A

RAL

Capri Blue 5019

ΔE 9.1 · #1B5583

Kobra

Blue 30

ΔE 9.4 · #195584

IKEA

IKEA122 122

ΔE 13.8 · #3A5170

Farrow & Ball

Pitch Blue 220

ΔE 17.8 · #636E8F

Dutch Boy

Delft Blue 7447

ΔE 18.6 · #003B67

Colorhouse

Dream .06 Dream-06

ΔE 20.2 · #0E707B

Light Reflectance & Undertone

Light Reflectance Value (LRV)

11/100

Dark

0 · DarkLight · 100

Soaks up light and feels moody and intimate. Great for studies, dining rooms and accent walls; pair with ample lighting.

Undertone

TemperatureCool MasstoneBlue UndertoneViolet

Reads as a cool blue with a violet undertone showing through, especially in daylight. Pair trim and adjacent colours to either calm or amplify that undertone.

Color Theory

Complementary

#01638B

#892701

Analogous

#01896B

#01638B

#011E89

Triadic

#01638B

#890162

#628901

Split-Complementary

#01638B

#89011E

#896B01

Tetradic

#01638B

#6B0189

#892701

#1E8901

Monochromatic

#001219

#002C3D

#01638B

#0199D5

#25C0FE

Rectangle

#01638B

#270189

#892701

#628901

Compound

#01638B

#011E89

#892701

#896B01

Variations

Lighter

#0198D3

#31B8ED

#91D1EB

Darker

#004F6E

#00364C

#00202C

Saturation

#304E59

#016289

#006389

Interior Use

Best Rooms

bedrooms, bathrooms, home offices

Best Uses

main walls, ceilings, trim, cabinetry

Pairs With

warm white trim, oak or walnut, brass or matte black hardware

Accessibility (WCAG)

vs White

6.65:1

vs Black

3.16:1

AA Large

Deuteranopia

#01638B

#40578C

Original → Simulated

Protanopia

#01638B

#5B5B87

Original → Simulated

Tritanopia

#01638B

#006A63

Original → Simulated

Color Psychology

Focused · Cooling

Reservoir lowers the temperature of a room — useful in south-facing rooms that overheat visually, and in home offices where you want a clear head. Pair with warm wood and brass to keep it from reading clinical.

SymbolismTrust, depth, stability

PersonalityClear-headed, dependable, contemplative

focustrustcalmofficebedroomdepth

How it looks under different light

#407783

Warm Bulb 2700K

Incandescent / soft white LED — pulls colour toward yellow/amber.

#01638B

Daylight 5500K

Midday natural light or daylight-spec LED — closest to the paint chip.

#2D7CA8

Cool Bulb 6500K

Cool white LED / overcast daylight — pulls colour toward blue.

Pairs With

#E7ECEE

Trim

Matched off-white

Same hue at 92% lightness — trim reads coordinated, not stark.

#F7F8F8

Ceiling

Whisper tint

Near-white with a hint of the hero's undertone — ceiling feels intentional.

#69260C

Accent

Complementary punch

Hue +180°, slightly muted for paint vs. screen — use on a door, frame, or single piece.

#574738

Floor

Walnut neutral

Warm mid-brown grounds the scheme regardless of hero hue.

Paint Info

Brand · Product Line

Benjamin Moore / Regal Select Interior

Recommended Finishes

Eggshell (walls) · Pearl (trim) · Matte (ceiling)

Eggshell hides imperfections on main walls while keeping the color rich; pearl on trim adds subtle sheen and easier cleaning; flat matte on ceilings prevents glare.

Best Surfaces

Primary walls · Cabinetry · Doors · Mouldings

Coverage & Dry Time

Typical coverage 350-400 sq ft per gallon over a primed surface.

Touch-dry in ~1 hour. Recoat after 4 hours. Full cure 7-14 days.

Primer

Standard primer is adequate.

Application Tip

Use a 9" microfiber roller on walls and a 2.5" angled sash brush for trim cuts. Two coats minimum for even depth.

Paint Calculator

Wall area (m²)

Coats

Coverage (m² / L)

You'll need

4.0 litres

1.06 US gallons · room for one touch-up coat. Buy slightly more to ensure single-batch match.

Code Snippets

CSS — color

color: #01638B;

CSS — background

background-color: #01638B;

CSS Variable

--color-reservoir: #01638B;

Tailwind v3 — config

colors: { 'reservoir': '#01638B' }

Tailwind — arbitrary

bg-[#01638B] text-[#01638B]

SCSS

$reservoir: #01638B;

Similar Colors

Bermuda Blue

#185D82 · ΔE 3.6

Blueberry

#1A5E89 · ΔE 4.4

Caribbean Azure

#00567C · ΔE 5.5

Laguna Blue

#00719C · ΔE 5.9

Mistral

#10557D · ΔE 6.5

Bellbottom Blues

#386B8C · ΔE 7.2

Seaport Blue

#006EA1 · ΔE 7.7

Blue Macaw

#2474A3 · ΔE 8.0

Built by DSGN.HOUSE Updated 2026

Our color tools run on our own catalogue of 26,000+ real paint colors across 16 brands — Benjamin Moore, Sherwin-Williams, Behr, Dulux, RAL and more — with the color math (HSL and CIELAB matching) computed in-house, not scraped from summaries. Every color you pick maps to a real, buyable paint with its code, so what you see here you can actually take to the store. We review and update these tools and their data regularly.

Created by Denis Kataev, founder of DSGN.HOUSE — a software engineer and digital entrepreneur building professional color-design tools for everyone.

Frequently Asked Questions

What color is #01638B?

#01638B is Reservoir, a deep blue with a cool undertone.

Is #01638B warm or cool?

Reservoir reads cool, which influences how it interacts with surrounding tones and natural light.

What rooms work best with Reservoir?

Reservoir works well in bedrooms, bathrooms, home offices. Designers typically use it for main walls, ceilings, trim, cabinetry.

What colors pair well with Reservoir?

Reservoir pairs naturally with warm white trim, oak or walnut, brass or matte black hardware. Its complementary color is also a strong contrast option for accents.

Where can I download Reservoir?

You can download Reservoir on DSGN.HOUSE in 15 designer formats including CSS gradient, Figma, Procreate swatches, Tailwind config, Adobe ASE, SVG, and 4K wallpapers — all free.

What's the hex code for Reservoir?

The hex code is #01638B. In RGB it's 1, 99, 139, and in HSL it's 197°, 99%, 27%.

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